A new method for accomplishing land locomotion by vibrating a mass attached to a skid has been developed. The mass oscillates in an inclined direction, upward and forward, downward and backward. On the up-forward stroke it lifts the skid and pulls it forward; on the down-backward stroke it pushes the skid into the ground and the increased friction inhibits backslide. The paper presents the essentials of the theory of operation, a design chart, and reports on experiments with test skids.

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